The Colloid - A form of fluid that is similar to a suspension (a fluid consisting of insoluble particles of a substance suspended in a liquid). Particles in a suspension are large and heavy enough to be separated from the liquid in a centrifuge.
A colloid has smaller, lighter particles that can only be separated out of the liquid by spinning at a very high speed. In medicine, plasma proteins are separated from blood and sometimes used in colloid preparations to treat shock. The term “colloid” also refers to a material that contains protein and is found in the thyroid gland.
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